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@@ -220,6 +220,24 @@ int edid_get_timing_validate(u8 *buf, int buf_size,
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/* Look for detailed timing in base EDID */
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found = edid_find_valid_timing(edid->monitor_details.descriptor, 4,
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timing, mode_valid, mode_valid_priv);
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+
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+ /* Look for detailed timing in CTA-861 Extension Block */
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+ if (!found && edid->extension_flag && buf_size >= EDID_EXT_SIZE) {
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+ struct edid_cea861_info *info =
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+ (struct edid_cea861_info *)(buf + sizeof(*edid));
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+
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+ if (info->extension_tag == EDID_CEA861_EXTENSION_TAG) {
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+ int count = EDID_CEA861_DTD_COUNT(*info);
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+ int offset = info->dtd_offset;
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+ int size = count * sizeof(struct edid_detailed_timing);
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+
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+ if (offset >= 4 && offset + size < EDID_SIZE)
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+ found = edid_find_valid_timing(
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+ (u8 *)info + offset, count, timing,
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+ mode_valid, mode_valid_priv);
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+ }
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+ }
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+
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if (!found)
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return -EINVAL;
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